Apparatus for impregnating liquids with coagulants.



- J. W. LEDOUX. APPARATUS FOR IMPREGN-ATING LIQUIDS WITH GOAGULANTS.

APPLIOATIQK FI ED NOV. 28. 1908.

976,665. Patented Nov. 22, 1910.

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APPLIUATION FILED NOV. 28, 1908.

Patented Nov. 22, 1910.

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JOHN W. LEDOUX, OF SWAR'II-IMORE, PENNSYLVANIA.

APPARATUS FOR IMPBEGNATING LIQUIDS WITH COAGULANTS.

Specification of Letters Patent.

Patented Nov. 22, 1910.

Application filed. November 28, 1908. Serial No. 464,939.

To all whom it may concern:

Be it known that I, JOHN W. LEDOUX, a citizen of the United States,residing at Swarthmore, in the county of Delaware and State ofPennsylvania, have invented certain Improvements in Apparatus for use inImpregnating Liquids with Coagulants.

My invention is designed primarily to provide improved means forimpregnating water with a suitable substance, such as alum, to effectthe coagulation and removal by filtration of foreign matter, and to thisend, in the preferred operation, a regulated quantity of water iscarried through a regulated quantity of coagulant at a uniform rate sothat the impregnation obtained is of the desired degree.

The characteristic features of the improve ments are fully disclosed inthe accompanying drawings and the following description thereof.

in the drawin s. F i 'ure 1 is an elevation 3 inclusive, comprises aframe 1 which supports a downwardly tapered water tank 2 having a pipe 3communicating therewith through the bottom thereof, a perforateddiaphragm or screen 4 disposed above the bottom, and a weir or spout 5disposed above the diaphragm and discharging into the mouth 6 of a pipe7. A downwardly tapered coagulant receptacle 8 is supported by theblocks 9 with its lower open end in the tank between the diaphragm andweir; the body of the receptacle extending above the tank and beingadapted for containing a store of coa ulant which is fed into the tankand supported by the diaphragm. A. pipe 10, having a wide mouth orfunnel 11, is connected with the pipe 3 between the valve 12 therein andthe bottom of the tank 2, and a vessel 13 has near the bottom thereofthe apertures let which discharge into the funnel, the apertures beingprovided with plugs 15, by which the amount of the discharge from thevessel can be regulated. A pipe 16, leading to the vessel 13, contains avalve 17 which is connected by a rod 18 with a float 19 in the vessel,the flow through the pipe into the vessel being automaticallycontrolled, and the desired head of water in the vessel maintained bythe float. An over-flow pipe 20, leading from the vessel 13 to the pipe3, is provided with an inlet mouth 21 which is placed in the vessel andlimits the upper level of the water therein. A pipe 22, controlled by avalve leads from the pipe 16 to position to discharge into the funnel 6and supply water thereto which has not been charged with the coagulant.

It will be understood that by means of the automatically operated valve17 and the overflow pipe a constant head is maintained in the vessel 13by which a constant quantity of water flows by way of the pipe 10through a constant quantity of coagulant supported. within the tank 2and the receptacle 8; the impregnated water discharging from the vessel2 by way of the spout 5 and the coagulant feeding down from thereceptacle 8 to maintain the constant quantity immersed as depletiontakes place through its absorption by the water.

In Fig. 4 there is shown a modified form of apparatus comprising thetank 24 having connected with the bottom thereof the inlet pipe 25controlled by the valve 26, and leading from the tank the pipe 27connected by the internally threaded sleeve 28 (set in the bottom) withthe pipe section 29 having the mouth 30 within the tank, the height ofthe mouth being variable to vary the volume of water in the tank byscrewing the pipe section up or down in the sleeve.

A receptacle 31, for holding the coagulant, has its downwardly taperedperforated bottom 32 disposed within the tank and held in adjust-ablerelation thereto. To support and adjust the elevation of the receptacle,bearings 33 on the tank support the threaded rods 34 and bearings on thereceptacle are supported by the threaded rods 36, the re spective rodsbeing connected by the turn buckles 37 with which they form struts. Thedesired amount of the coagulant immersed in the water, as well as thedesired amount of water in process of impregnation by contact with thecoagulant through the perforated bottom, can thus be regulated, whilethe wasting alum is replaced by gravitation from the store in thereceptacle.

The pipe 25 is connected with the pipe containing a valve 12 and havinga funnel 11 thereon. The vessel 13 discharges through the. aperture 14into the funnel at a constant rate, which is maintained by maintaining aconstant level in the tank 15,

the latter being supplied by the pipe 16 controlled by the valve 17 anddischarging by the overflow pipe 20 having the inlet 21. Water that hasbeen impregnated may be 7 further diluted by means of a pipe 55'controlled by a valve56 adapted for discharg- 7 ing water into the pipe29 by way of the funnel 30. I a

In the construction shown in Fig. 4 the tank 24, having the perforatedbottom of the receptacle 31 therein, is provided with an outlet pipe 38which is connected by a flexible hose 39 with a funnel or mouth 40, thelatter having a bail 41 connected with a gage rod 42 which moves throughthe way 43 and can be fixed in any desired position.

In the construction shown in Fig. 5, the

. downwardly tapered tank 44 has connected with the bottom thereof aninlet pipe 45 controlled by the valve 46 and near the top thereof thespout or weir 47 which dis charges into the mouth 48 of the pipe 49. Ashield 50 is supported within the tank (so as to cover the weir withoutcutting it ofl' from the inlet pipe) a'ndtapers downwardly toan'openmouth 51 above a diaphragm or screen 52 placed above the inlet.

' A' coagulant receptacle 53, suitably supported on the tank 44 bybrackets 44, has its open mouth 54 disposed within the shield, thecoagulant falling from the receptacle upon and through the shield to thescreen,

tained between the volume of water and coagulant in'contact.

Having described my invention, I claim:

- '1. In apparatus of the class described, the combination of means forholding a predetermined quantity of a liquid, means for charging saidliquid at a predetermined rate, with means for maintaining in saidliquid a predetermined quantity of solid, whereby said liquid absorbs asubstantially constant amount of said solid.

2. In apparatus of the class described, a container and means forpassing liquid therethrough at a predetermined rate, in combination withmeans for maintaining a predetermined quantity of solid in the liquid insaid container.

3. In apparatus of the class described a liquid container having anoutlet for maintaining the level of liquid therein, means for holding astore of coagulant and feeding the same to said liquid so as to maintaina constant amount thereof submerged in said liquid, means for supplyingliquid to said container, and means for maintaining a constant liquidhead controlling said liquid supply.

4. In apparatus of the class described, a liquid container and meanswhereby the liquid therein is charged at a predetermined rate, incombination with means for holding a store of solid and feeding it sothat a predetermined amount thereof is dissolved in the liquid in saidcontainer.

5. In apparatus of the class described, a liquid container having anoverflow passage connected therewith for maintaining the desired levelof liquid therein, means for holding a store of coagulant and supplyingthe same to said liquid so as to maintain a constant quantity ofcoagulant therein, means for supplying liquid to said container under aconstant head, and means for re ulating the amount of liquid dischargedunliler said head to said vessel.

6. In apparatus of the class described, a tank having an outlet abovethe bottom thereof and means whereby water therein is changed at asubstantially uniform rate, in combination-with means for holding astore of coagulant and maintaining a substantially uniform quantitythereof in the water in said tank.

7. In apparatus of the class described, a water tank, means forsupplying Water to said tank at a substantially uniform rat-e, an outletvariable in elevation by which water flows from said tank, and areservoir for holding a store of coagulant above the water level in saidtank and feeding said 00- agulant so that a substantially uniform amountthereof is maintained in the water in said tank.

S. In apparatus of the class described, a water tank, means for changingthe water in said tank at various predetermined rates, a reservoir forholding a coagulant above and beneath the water level in said tank, andmeans for varying the elevation of said reservoir relatively to saidtank.

9. In apparatus of the classs described, a water tank, means forchanging the water therein at a predetermined rate, a reservoir forholding a coagulant above and beneath the water level in said tank, andmeans for adjusting the height of said reservoir relatively' to saidtank. I

10. In apparatus of the class described, a

container with means for passing Water my name this 21st day of October,A. therethrough et a predetermined rate, 1908, in the presence of thesubscribing Witmeans for maintaining a predetermined nesses.

amount of coagulant in said Water, and JOHN W. LEDOUX. 5 means fordilutmg said Water impregnated fitnesses:

With said solid. ROBERT JAMES EARLEY,

In Witness whereof I have hereunto set Jos. G. DENNY,J1'.

